1 files changed, 79 insertions, 0 deletions
diff --git a/vendor/web-token/jwt-signature-algorithm-ecdsa/ECDSA.php b/vendor/web-token/jwt-signature-algorithm-ecdsa/ECDSA.php
new file mode 100644
index 0000000..f3e2790
--- /dev/null
+++ b/vendor/web-token/jwt-signature-algorithm-ecdsa/ECDSA.php
@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2014-2018 Spomky-Labs
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
+namespace Jose\Component\Signature\Algorithm;
+
+use Jose\Component\Core\JWK;
+use Jose\Component\Core\Util\ECKey;
+use Jose\Component\Core\Util\ECSignature;
+
+abstract class ECDSA implements SignatureAlgorithm
+{
+    public function __construct()
+    {
+        if (!\defined('OPENSSL_KEYTYPE_EC')) {
+            throw new \RuntimeException('Elliptic Curve key type not supported by your environment.');
+        }
+    }
+
+    public function allowedKeyTypes(): array
+    {
+        return ['EC'];
+    }
+
+    public function sign(JWK $key, string $input): string
+    {
+        $this->checkKey($key);
+        if (!$key->has('d')) {
+            throw new \InvalidArgumentException('The EC key is not private');
+        }
+
+        $pem = ECKey::convertPrivateKeyToPEM($key);
+        $result = \openssl_sign($input, $signature, $pem, $this->getHashAlgorithm());
+        if (false === $result) {
+            throw new \RuntimeException('Signature failed.');
+        }
+
+        return ECSignature::fromDER($signature, $this->getSignaturePartLength());
+    }
+
+    public function verify(JWK $key, string $input, string $signature): bool
+    {
+        $this->checkKey($key);
+
+        try {
+            $der = ECSignature::toDER($signature, $this->getSignaturePartLength());
+            $pem = ECKey::convertPublicKeyToPEM($key);
+
+            return 1 === \openssl_verify($input, $der, $pem, $this->getHashAlgorithm());
+        } catch (\Exception $e) {
+            return false;
+        }
+    }
+
+    abstract protected function getHashAlgorithm(): string;
+
+    abstract protected function getSignaturePartLength(): int;
+
+    private function checkKey(JWK $key)
+    {
+        if (!\in_array($key->get('kty'), $this->allowedKeyTypes(), true)) {
+            throw new \InvalidArgumentException('Wrong key type.');
+        }
+        foreach (['x', 'y', 'crv'] as $k) {
+            if (!$key->has($k)) {
+                throw new \InvalidArgumentException(\sprintf('The key parameter "%s" is missing.', $k));
+            }
+        }
+    }
+}